linux_dsm_epyc7002/drivers/gpu/drm/imx/parallel-display.c
Sam Ravnborg 06c4a9c2ae drm/panel: decouple connector from drm_panel
To facilitate moving connector creation to display drivers,
decouple the drm_connector from drm_panel.

This patch adds a connector argument to drm_panel_get_modes().

All users of drm_panel_get_modes() already had the connector
available, so updating users was trivial.

With this patch drm_panel no longer keeps a reference to the drm_connector.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Jeffrey Hugo <jeffrey.l.hugo@gmail.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Andrzej Hajda <a.hajda@samsung.com>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Jonas Karlman <jonas@kwiboo.se>
Cc: Jernej Skrabec <jernej.skrabec@siol.net>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Inki Dae <inki.dae@samsung.com>
Cc: Joonyoung Shim <jy0922.shim@samsung.com>
Cc: Seung-Woo Kim <sw0312.kim@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Kukjin Kim <kgene@kernel.org>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Stefan Agner <stefan@agner.ch>
Cc: Alison Wang <alison.wang@nxp.com>
Cc: Philipp Zabel <p.zabel@pengutronix.de>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Pengutronix Kernel Team <kernel@pengutronix.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: NXP Linux Team <linux-imx@nxp.com>
Cc: CK Hu <ck.hu@mediatek.com>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Cc: Sandy Huang <hjc@rock-chips.com>
Cc: "Heiko Stübner" <heiko@sntech.de>
Cc: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Cc: Vincent Abriou <vincent.abriou@st.com>
Cc: Chen-Yu Tsai <wens@csie.org>
Cc: Jonathan Hunter <jonathanh@nvidia.com>
Cc: Torsten Duwe <duwe@lst.de>
Cc: Vasily Khoruzhick <anarsoul@gmail.com>
Cc: Icenowy Zheng <icenowy@aosc.io>
Cc: Sean Paul <seanpaul@chromium.org>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Boris Brezillon <boris.brezillon@collabora.com>
Cc: Hariprasad Kelam <hariprasad.kelam@gmail.com>
Cc: Alexios Zavras <alexios.zavras@intel.com>
Cc: Brian Masney <masneyb@onstation.org>
Cc: Rob Clark <robdclark@chromium.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Allison Randal <allison@lohutok.net>
Cc: Shayenne Moura <shayenneluzmoura@gmail.com>
Cc: Abhinav Kumar <abhinavk@codeaurora.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-samsung-soc@vger.kernel.org
Cc: linux-mediatek@lists.infradead.org
Cc: linux-renesas-soc@vger.kernel.org
Cc: linux-rockchip@lists.infradead.org
Cc: linux-tegra@vger.kernel.org
Link: https://patchwork.freedesktop.org/patch/msgid/20191207140353.23967-7-sam@ravnborg.org
2019-12-09 22:57:26 +01:00

294 lines
7.4 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* i.MX drm driver - parallel display implementation
*
* Copyright (C) 2012 Sascha Hauer, Pengutronix
*/
#include <linux/component.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/videodev2.h>
#include <video/of_display_timing.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_bridge.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_of.h>
#include <drm/drm_panel.h>
#include <drm/drm_probe_helper.h>
#include "imx-drm.h"
struct imx_parallel_display {
struct drm_connector connector;
struct drm_encoder encoder;
struct device *dev;
void *edid;
int edid_len;
u32 bus_format;
u32 bus_flags;
struct drm_display_mode mode;
struct drm_panel *panel;
struct drm_bridge *bridge;
};
static inline struct imx_parallel_display *con_to_imxpd(struct drm_connector *c)
{
return container_of(c, struct imx_parallel_display, connector);
}
static inline struct imx_parallel_display *enc_to_imxpd(struct drm_encoder *e)
{
return container_of(e, struct imx_parallel_display, encoder);
}
static int imx_pd_connector_get_modes(struct drm_connector *connector)
{
struct imx_parallel_display *imxpd = con_to_imxpd(connector);
struct device_node *np = imxpd->dev->of_node;
int num_modes;
num_modes = drm_panel_get_modes(imxpd->panel, connector);
if (num_modes > 0)
return num_modes;
if (imxpd->edid) {
drm_connector_update_edid_property(connector, imxpd->edid);
num_modes = drm_add_edid_modes(connector, imxpd->edid);
}
if (np) {
struct drm_display_mode *mode = drm_mode_create(connector->dev);
int ret;
if (!mode)
return -EINVAL;
ret = of_get_drm_display_mode(np, &imxpd->mode,
&imxpd->bus_flags,
OF_USE_NATIVE_MODE);
if (ret)
return ret;
drm_mode_copy(mode, &imxpd->mode);
mode->type |= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
drm_mode_probed_add(connector, mode);
num_modes++;
}
return num_modes;
}
static struct drm_encoder *imx_pd_connector_best_encoder(
struct drm_connector *connector)
{
struct imx_parallel_display *imxpd = con_to_imxpd(connector);
return &imxpd->encoder;
}
static void imx_pd_encoder_enable(struct drm_encoder *encoder)
{
struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);
drm_panel_prepare(imxpd->panel);
drm_panel_enable(imxpd->panel);
}
static void imx_pd_encoder_disable(struct drm_encoder *encoder)
{
struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);
drm_panel_disable(imxpd->panel);
drm_panel_unprepare(imxpd->panel);
}
static int imx_pd_encoder_atomic_check(struct drm_encoder *encoder,
struct drm_crtc_state *crtc_state,
struct drm_connector_state *conn_state)
{
struct imx_crtc_state *imx_crtc_state = to_imx_crtc_state(crtc_state);
struct drm_display_info *di = &conn_state->connector->display_info;
struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);
if (!imxpd->bus_format && di->num_bus_formats) {
imx_crtc_state->bus_flags = di->bus_flags;
imx_crtc_state->bus_format = di->bus_formats[0];
} else {
imx_crtc_state->bus_flags = imxpd->bus_flags;
imx_crtc_state->bus_format = imxpd->bus_format;
}
imx_crtc_state->di_hsync_pin = 2;
imx_crtc_state->di_vsync_pin = 3;
return 0;
}
static const struct drm_connector_funcs imx_pd_connector_funcs = {
.fill_modes = drm_helper_probe_single_connector_modes,
.destroy = imx_drm_connector_destroy,
.reset = drm_atomic_helper_connector_reset,
.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
};
static const struct drm_connector_helper_funcs imx_pd_connector_helper_funcs = {
.get_modes = imx_pd_connector_get_modes,
.best_encoder = imx_pd_connector_best_encoder,
};
static const struct drm_encoder_funcs imx_pd_encoder_funcs = {
.destroy = imx_drm_encoder_destroy,
};
static const struct drm_encoder_helper_funcs imx_pd_encoder_helper_funcs = {
.enable = imx_pd_encoder_enable,
.disable = imx_pd_encoder_disable,
.atomic_check = imx_pd_encoder_atomic_check,
};
static int imx_pd_register(struct drm_device *drm,
struct imx_parallel_display *imxpd)
{
struct drm_encoder *encoder = &imxpd->encoder;
int ret;
ret = imx_drm_encoder_parse_of(drm, encoder, imxpd->dev->of_node);
if (ret)
return ret;
/* set the connector's dpms to OFF so that
* drm_helper_connector_dpms() won't return
* immediately since the current state is ON
* at this point.
*/
imxpd->connector.dpms = DRM_MODE_DPMS_OFF;
drm_encoder_helper_add(encoder, &imx_pd_encoder_helper_funcs);
drm_encoder_init(drm, encoder, &imx_pd_encoder_funcs,
DRM_MODE_ENCODER_NONE, NULL);
if (!imxpd->bridge) {
drm_connector_helper_add(&imxpd->connector,
&imx_pd_connector_helper_funcs);
drm_connector_init(drm, &imxpd->connector,
&imx_pd_connector_funcs,
DRM_MODE_CONNECTOR_DPI);
}
if (imxpd->panel)
drm_panel_attach(imxpd->panel, &imxpd->connector);
if (imxpd->bridge) {
ret = drm_bridge_attach(encoder, imxpd->bridge, NULL);
if (ret < 0) {
dev_err(imxpd->dev, "failed to attach bridge: %d\n",
ret);
return ret;
}
} else {
drm_connector_attach_encoder(&imxpd->connector, encoder);
}
return 0;
}
static int imx_pd_bind(struct device *dev, struct device *master, void *data)
{
struct drm_device *drm = data;
struct device_node *np = dev->of_node;
const u8 *edidp;
struct imx_parallel_display *imxpd;
int ret;
u32 bus_format = 0;
const char *fmt;
imxpd = devm_kzalloc(dev, sizeof(*imxpd), GFP_KERNEL);
if (!imxpd)
return -ENOMEM;
edidp = of_get_property(np, "edid", &imxpd->edid_len);
if (edidp)
imxpd->edid = kmemdup(edidp, imxpd->edid_len, GFP_KERNEL);
ret = of_property_read_string(np, "interface-pix-fmt", &fmt);
if (!ret) {
if (!strcmp(fmt, "rgb24"))
bus_format = MEDIA_BUS_FMT_RGB888_1X24;
else if (!strcmp(fmt, "rgb565"))
bus_format = MEDIA_BUS_FMT_RGB565_1X16;
else if (!strcmp(fmt, "bgr666"))
bus_format = MEDIA_BUS_FMT_RGB666_1X18;
else if (!strcmp(fmt, "lvds666"))
bus_format = MEDIA_BUS_FMT_RGB666_1X24_CPADHI;
}
imxpd->bus_format = bus_format;
/* port@1 is the output port */
ret = drm_of_find_panel_or_bridge(np, 1, 0, &imxpd->panel, &imxpd->bridge);
if (ret && ret != -ENODEV)
return ret;
imxpd->dev = dev;
ret = imx_pd_register(drm, imxpd);
if (ret)
return ret;
dev_set_drvdata(dev, imxpd);
return 0;
}
static void imx_pd_unbind(struct device *dev, struct device *master,
void *data)
{
struct imx_parallel_display *imxpd = dev_get_drvdata(dev);
if (imxpd->panel)
drm_panel_detach(imxpd->panel);
kfree(imxpd->edid);
}
static const struct component_ops imx_pd_ops = {
.bind = imx_pd_bind,
.unbind = imx_pd_unbind,
};
static int imx_pd_probe(struct platform_device *pdev)
{
return component_add(&pdev->dev, &imx_pd_ops);
}
static int imx_pd_remove(struct platform_device *pdev)
{
component_del(&pdev->dev, &imx_pd_ops);
return 0;
}
static const struct of_device_id imx_pd_dt_ids[] = {
{ .compatible = "fsl,imx-parallel-display", },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, imx_pd_dt_ids);
static struct platform_driver imx_pd_driver = {
.probe = imx_pd_probe,
.remove = imx_pd_remove,
.driver = {
.of_match_table = imx_pd_dt_ids,
.name = "imx-parallel-display",
},
};
module_platform_driver(imx_pd_driver);
MODULE_DESCRIPTION("i.MX parallel display driver");
MODULE_AUTHOR("Sascha Hauer, Pengutronix");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:imx-parallel-display");